If you are inserting a 90 degree diagonal in front of those eyepieces, you are probably running out of focus travel on the binocular
are not made with much extra travel distance in the focuser and the extra focal length you add with a diagonal is not covered with the focuser. Telescopes
typically are made with more focus travel, since the manufacturer knows that telescopes
are often used with other accessories. You will most likely need to forget the 90 degree setup. Sorry
As for the mount, that is a tough one. The best option I have used is a large parallelogram mount designed to handle that kind of weight. I have used two of these, but they were custom made jobs and the owners would not sell them at any price. (I know, I tried.) I have yet to see any commercially available parallelogram mount on the market that can effectively handle that kind of weight, but you might do a google search and see what you can find. Nothing comes close to a good parallelogram mount when it comes to astronomy with binoculars
, but you will need something built to handle that kind of load.
As for a photo mount, forget it. You can equal the stability of the wood tripod
and mount that comes with the Oberwerk
, but it will cost you dearly to better it and it still won't get you the views you want, overhead. If you are spending that kind of money, I would put it into finding a parallelogram mount.